Locomotive truck



Nov. 3, 1925' G. H. GIBSON LOCOMOTIVE TRUCK Filed Jan. 10, 1925 A IV-IIl+ llllll Irma/liar Patented Nov. 3, 1925.

UNITED STATES 1,559,604 PATENT OFFICE.

GEORGE E. GIBSON, OF ST. LOUIS, MISSOURI, ASSIGNOR TO COMMONWEALTH STEELCOMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF NEW JERSEY.

LOCOMOTIVE TRUCK.

Application filed January 10, 1925. Serial No. 1,621.

To all whom it may concern:

Be it known that I, GEORGE H, GIBsoN, a citizen of the United States,residing at St. Louis, Missouri, have invented a certain new and usefulImprovement in Locomotive Trucks, of which the following is aspecification, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to railroad rolling stock and particularly to theconstruction of trucks which include rocker bearings. Where suchbearings are provided, it will be understood that the parts carried bythe rockers have movement in the plane of the rocking motion of therockers. In addition to this movement, there is a bodily movement of theparts carried by the rockers in a direction transversely of the plane ofrocking motion. This latter movement tends to 'disalign the rockers andthe rocker seats and the elements mounted on the rockers, and the objectof my invention is to provide means for maintaining proper alignment ofthese parts, for limiting bodily movement of the elements transverselyof the rocking motion and for receiving the wear due to such motion.Preferably this means is renewable so that after consider- 30 able Wearhas taken place, the original relation may be maintained by replacingthe worn means.

In the accompanying drawings which illustrate a selected embodiment ofmy invention- Figure 1 is a top plan view of a locomotive two wheeltruck equipped with rocker bearings for its bolster element.

Figure 2 is in part an end view of the truck and in part a verticaltransverse section on the center line of the truck.

Figure 3 is a vertical longitudina taken on line 3-3 of Figure 1.

The truck comprises the usual wheels 1, axle 2, boxes 3, and springs 4.Mounted on the springs is a frame 5 here shown as a one-piece casting.Frame 5 includes brackets 6 which carry rocker seats 7. These rockerseats mount rockers 8 which have a rocking motion on their seatstransversely of the truck. Preferably, rockers 8 are arranged in pairs,one pair at the front of the truck and one pair at the rear. The rockersof each pair are aligned transversely of the truck and cooperate insupporting a rocker bearing 9 which is vertically aligned with itsrespective rockers 8.

A bolster 10 rests upon rocker bearings 9 and the bolster and rockerbearing are secured to each other by countersunk rivets 11. It will benoted that rocker bearing 9 is in vertical alignment with rockers 8. Itwill also be noted that bolster 10, rocker bearings 9, and rockers 8 arepositioned be tween the side walls 12 of the truck frame. As the load onthebolster shifts longitudinally of the truck, there will be movement ofthe bolster and rocker and rocker bearings to and from the oppositewalls 12 and this movement is limited by chafing plates 13 secured tothe frame walls by means of countersunk rivets and preferably formed ofhard steel to better withstand the friction vof the rockers and rockerbearings. In the absence of this plate, either the rocker or the rockerbearing might shift so that one of the edges of one of these elementswould be intermediate the edges of the other of the elements, and if thedevices should rock while in this disaligned position, the bearing areawould be reduced. Repeated rockings would result in a shoulder orshoulders being produced in the bearing surfaces by the edges of theopposing elements.

I have previously referred to the fact that plates 13 are renewable,but, as a matter of fact, when these'plates are made of hardened steel,any wear which takes place will be on the relatively softer rocker androcker bearings and if the play becomes too great, the rocker and rockerhearing may be replaced. In no event will there be wear upon therelatively large and expensive frame, nor will it be necessary tooperate with a greater clearance than is desired because of thedifficulty or expense of maintaining the desired minimum clearancebetween the rocker and bearing and the surfaces which limit the movementof these parts longitudinally of the truck.

While each of plates 13 may extend past both rockers 8 on its side ofthe truck, it is practical to provide individual plates for each rockerand at the upper portion of Figure 1, such an arrangement is indicated.Obviously, this and other modifications of the details of my inventionmay be made without departing from the spirit of my invention, asexpressed in the following claims, and I contemplate the exclusive useof such variations as may be covered by my claims.

I claim:

1. In a truck, a frame, a rocker having movement transversely of the.Plane of its rocking motion, a bearing mounted on said rocker, and achafing plate on said frame adjacent said rocker and bearing forlimiting said movement of said rocker relative to said bearing.

2. In a truck, a frame, a rocker carried thereby, a rocker bearingsupported by said rocker, a bolster carried by said bearing, and achafing plate on said frame adjacent said rocker and bearing forengaging the same when said bolster moves longitudinally of the truck.

3. In a truck, a frame including a rocker seat, a rocker thereon rockmgtransversely of the truck and having bodily movement longitudinally ofthe truck, and a hardened steel plate applied to said frame so astoengage said rocker and limit its bodily movement.

4. In a truck, a frame including a rocker seat, a rocker thereon rockingtransversely of the truck and having bodily movement longitudinally ofthe truck, and a renewable chafing plate applied to said frame so as toengage said rocker and limit its bodily movement.

5. In a truck, a frame including parallel vertical walls extendingtransversely of the truck, rocker seats, rockers on said seats rockingtransversely of the truck, a' bolster carried b said rockers, saidrockers and bolster being located between said walls and having movementlongitudinally of the truck to and from said walls, and renewablechafing plates on said walls to maintain a substantial alignment of saidrockers and bolster.

6. In a truck, a frame, a rocker seat thereon, rockers on said seatnormally aligned with each other in the plane of their rocking motion, arocker bearing resting on said rockers, a bolster carried by saidbearing, and chafing plates on said frame for maintaining said rockersin substantial alignment with each other and with said hearing.

In testimony whereof I hereunto afiix my signature this 5 day ofJanuary, 1925.

GEO. H. GIBSON.

